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WO2019179676A1 - Installation servant à réchauffer et/ou à évaporer un fluide et procédé servant à faire fonctionner une installation de ce type - Google Patents

Installation servant à réchauffer et/ou à évaporer un fluide et procédé servant à faire fonctionner une installation de ce type Download PDF

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Publication number
WO2019179676A1
WO2019179676A1 PCT/EP2019/051857 EP2019051857W WO2019179676A1 WO 2019179676 A1 WO2019179676 A1 WO 2019179676A1 EP 2019051857 W EP2019051857 W EP 2019051857W WO 2019179676 A1 WO2019179676 A1 WO 2019179676A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
heat
line
exhaust gas
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2019/051857
Other languages
German (de)
English (en)
Inventor
Daniel Zurhausen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2019179676A1 publication Critical patent/WO2019179676A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/025—Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Definitions

  • the invention relates to a system for heating and / or evaporation Ver of a fluid, which an exhaust gas heat exchanger for transmitting exhaust heat to the fluid, an inlet connected to a fluid of the exhaust gas heat exchanger Fluidein lasstechnisch for supplying the fluid to the exhaust heat exchanger over and a corrosion protection device for heating the fluid flowing through the fluid inlet conduit. Fer ner the invention relates to a method for operating such a system.
  • An exhaust gas heat exchanger is one of an exhaust gas and a fluid to be heated and / or vaporized
  • An exhaust gas from a technical incinerator may contain one or more substances, such as sulfur oxides, carbon oxides, chlorine and / or bromine, which in the presence of water vapor one or more acids such as sulfuric acid, carbonic acid, hydrochloric acid and / or Hydrobromic acid, can / can.
  • Such an acid may, if the temperature of a heat exchange surface of the exhaust gas heat exchanger is at or below the dew point temperature of the acid, condense on the heat exchange surface and cause corrosion on the exhaust gas heat exchanger. In this connection, the so-called “cold end corrosion "spoken.
  • the surface temperature of a heat exchange surface of the gas from the heat exchanger is largely determined by the temperature of the fluid flowing into the exhaust gas heat exchanger. A condensation of an acid on the exhaust gas heat exchanger can be avoided if it is ensured that the Ab gas heat exchanger via a connected to the exhaust gas heat exchanger fluid inlet line fluid has a temperature Tem, which is above the dew point temperature of the acid.
  • An object of the invention is to chen ermögli an energy-efficient operation of a system of the type mentioned.
  • the plant according to the invention for heating and / or vaporizing a fluid comprises an exhaust gas heat exchanger for transferring exhaust gas heat to the fluid, a fluid inlet line connected to a fluid inlet of the exhaust gas heat exchanger for supplying the fluid to the exhaust gas heat exchanger and a Corrosion protection device for heating by the
  • the corrosion protection device comprises an absorption chiller for transferring heat from a heat source to be cooled to the fluid flowing through the fluid inlet line.
  • the invention is based on the consideration that at least part of the heat required for heating the fluid can be taken from the heat source to be cooled by means of the absorption chiller (also called absorption heat pump).
  • the absorption chiller makes it possible to supply the fluid for the purpose of corrosion protection heat from the heat source to be cooled.
  • the heat source to be cooled can be cooled using the absorption chiller by removing heat from the heat source to be cooled by the absorption chiller, generating energy by cooling the heat source needed for cooling, in particular by applying a high level of electrical energy
  • the cooling power required to cool the heat source can be obtained in an energy-efficient manner, especially since the absorption chiller has a low electrical power requirement, as measured by the refrigeration energy generated by it.
  • the absorption chiller thus enables energy-efficient operation of the system.
  • the heat supplied to the fluid through the absorption chiller advantageously causes more usable heat in the system, for example for steam generation, to be available, which may result in particular in a higher system efficiency.
  • the plant can be part of a power plant, for example.
  • the system may be part of a steam power plant, such as a gas and steam turbine power plant (CCGT), be.
  • CCGT gas and steam turbine power plant
  • the exhaust gas Heat exchanger of the system in particular be a flow through an exhaust preheater (also called economizer).
  • the corrosion protection device comprises a heat supply line for guiding a heat medium. Furthermore, it is advantageous if the heat supply line is thermally coupled to the absorption chiller, in particular at the expeller.
  • thermally coupled is to be understood as meaning that a first element that is thermally coupled to a second element can transfer heat to the second element.
  • Said heat medium can be used for operating the absorption refrigeration machine, in particular for operating an expeller of the absorption refrigeration machine.
  • the heat medium can be used to supply heat to the absorption refrigerating machine for its operation.
  • the heat supply line may include a valve, in particular a control valve, for adjusting the mass flow of the heat medium. Further, the heat supply line may be equipped with a feed pump, which serves to promote the heat medium through the heat supply line.
  • the exhaust gas heat exchanger expediently has a fluid input and a fluid outlet.
  • the said fluid can enter the exhaust gas heat exchanger through the fluid inlet and the said fluid can exit from the exhaust gas heat exchanger through the fluid outlet.
  • the system comprises a fluid outlet passage connected to the fluid outlet of the exhaust gas heat exchanger for discharging the fluid from the exhaust gas heat exchanger.
  • the aforementioned heat supply line opens with its input-side end preferably in the Fluidauslasslei device.
  • the heat supply line can open, for example, in the fluid inlet line.
  • the heat supply line opens both its input-side end and with its output side En de in the fluid outlet.
  • the fluid outlet advantageouslywei se between the input side end and the conditions exiting end of the heat supply line a valve, in particular a control valve, on.
  • the valve of the fluid outlet line can be used to adjust the mass flow of the heat medium in the heat supply line.
  • the plant comprises a steam generator, for example, to provide steam for the operation of egg steam turbine.
  • the steam generator can in particular be used to convert said fluid from a liquid state into steam.
  • the steam generator can include a steam boiler, an evaporator and / or a superheater.
  • the aforementioned Ab gas heat exchanger is preferably a component of the steam generator.
  • the heat supply line with its input-side end in the steam-side part of the steam generator, ie in that part of the steam generator in which the steam generator a contains vaporous medium, open.
  • the steam generator steam which may be in particular the said fluid in the vapor state, can be used as a heat medium for operating the absorption chiller.
  • the heat supply line opens with its output side end in this embodiment in the fluid inlet line.
  • the heat supply line with its one end at the other end in another device which (process) provides steam, which can be used as a heat medium for Betrei ben the absorption chiller.
  • the corrosion protection device can be a
  • Bypass line include.
  • Bypass line opens with its output end into the fluid inlet line.
  • the bypass line comprises a valve, in particular a control valve.
  • the valve of the bypass line can be used to control the mass flow of the heat medium in the
  • the system can include a coolant circuit.
  • the coolant circuit is thermally coupled to the absorption chiller, in particular at the United steamer. In this way, a coolant circulating in the coolant circulation can be used as said heat source to be cooled.
  • the coolant circuit comprises a refrigeration consumer or the coolant circuit is thermally coupled to a refrigeration consumer.
  • the cold consumer may be, for example, a device of a power plant.
  • the cold consumer can be a room to be cooled, such as a server room, or a Cooling device for cooling air at the entrance of a Turbi ne, for cooling a generator and / or for cooling components of an auxiliary system of the power plant.
  • the cold consumer may be, for example, a district cooling network.
  • the corrosion protection device comprises a heat dissipation line.
  • the heat removal line is thermally coupled to the absorption refrigeration machine, in particular to its condenser.
  • the heat removal line is preferably used to dissipate heat, which is provided by the absorption chiller, from the Ab sorptionshimltemaschine.
  • the heat removal line opens with its input-side end into the fluid inlet line. It is further preferred if the heat removal line opens into the fluid inlet line with its outlet-side end. This made it possible to supply the heat provided by the absorption chiller te heat through the heat dissipation in the direction Fluideinlasslei.
  • the fluid inlet line may have a valve, in particular a shut-off valve, between the inlet-side end of the heat-removal line and the outlet-side end of the heat-removal line.
  • This valve can be used to strictlytel len the mass flow of the fluid in the heat removal.
  • the inventive method is a method for Betrei ben the inventive system.
  • a fluid is passed through the fluid inlet line, transferred by the absorption cooling machine heat of a heat source to be cooled on the fluid, the heated fluid through the fluid inlet line supplied to the exhaust gas heat exchanger and transferred by means of the exhaust gas heat exchanger exhaust heat to the fluid.
  • said fluid is water, especially seawater.
  • the fluid can be used for example for driving a steam turbine.
  • Said exhaust heat is expediently emitted by an exhaust gas, which flows through the exhaust gas heat exchanger, to the exhaust gas heat exchanger, in particular to a heat exchange surface of the exhaust gas heat exchanger.
  • the absorption chiller in particular their expeller, using a heat medium be exaggerated, which is passed through a heat supply line, in particular by the aforementioned heat supply line of the onstik Korrosi device.
  • the fluid is removed from the exhaust gas choirübertra ger, in particular via the aforementioned Fluidaus lasstechnisch. It is advantageous if at least part of the fluid discharged from the exhaust gas heat exchanger is conducted through the heat supply line. In this way, the fluid, which is passed through the heat supply line can be used as a heat medium for operating the Absorptionslaltema machine.
  • the fluid from the heat supply line is led into the fluid inlet line. Since it can be achieved by the fluid from theticianver supply line to a component of the lasstechnisch flowing through the Fluidein fluid.
  • the (residual) heat contained in the fluid from the heat supply line can contribute to the fact that the fluid flowing through the fluid inlet line has a sufficiently high temperature so that condensation of corrosive substances from the exhaust gas is avoided at the exhaust gas heat exchanger.
  • the fluid can be conducted from the heat supply line into the fluid outlet line connected to the fluid outlet of the exhaust gas heat exchanger.
  • steam from a steam generator in particular from the aforementioned steam generator of the system, is passed through the heat supply line.
  • the steam can be used as the heat medium for operating the absorption chiller.
  • the steam flowing through the heat supply line condenses when the steam is used as the heating medium for operating the absorption chiller.
  • the steam in the fluid inlet line can be ge passes. In this way it can be achieved that the condensate, d. H. the condensed vapor becomes a component of the fluid flowing through the fluid inlet conduit.
  • the (residual) heat contained in the condensate can help ensure that the fluid flowing through the fluid inlet line has a sufficiently high temperature, so that the exhaust gas heat exchanger, a condensation of corrosive substances from the exhaust gas is avoided.
  • a coolant circulating in a coolant circuit in particular, a coolant circulating in the aforementioned coolant circuit of the system.
  • the coolant absorbs heat of a Kältever consumer. At least part of the coolant absorbed by the heat consumer of the refrigeration appliance is advantageously to the absorption chiller, especially at the United steamer delivered.
  • At least a portion of the fluid is passed through a heat removal conduit, in particular through the aforementioned heat removal conduit of the corrosion protection facility.
  • the heat of the heat source of the absorption chiller in particular of their condensate sator, discharged via the heat removal to the fluid in the heat removal line.
  • the fluid from the heat removal line in the fluid inlet (back) is passed. The heat absorbed by the fluid in this way can contribute to the fluid flowing through the fluid inlet line being at a sufficiently high temperature to prevent the exhaust heat exchanger from avoiding condensation of corrosive substances from the exhaust gas.
  • FIG. 1 schematically shows a first installation 2 for heating and / or evaporating a fluid 4.
  • the fluid 4 is feedwater and the installation 2 can in particular be a component of a combined cycle power plant.
  • the plant 2 comprises an exhaust gas heat exchanger 6 with a fluid inlet 8 and a fluid outlet 10.
  • the exhaust gas heat exchanger 6 is in the present Ausry approximately a feedwater heater.
  • the exhaust heat exchanger 6 is flowed through by an exhaust gas 12 from an incinerator, in particular from a gas turbine.
  • the system 2 comprises a fluid inlet line 14 which is connected directly to the fluid inlet 8 of the exhaust heat exchanger 6, and a fluid outlet line 16, wel che directly to the fluid outlet 10 of the exhaust heat exchanger 6 is connected.
  • the exhaust gas heat exchanger 6 is supplied via the fluid inlet line 14 with said fluid 4.
  • exhaust heat ie heat of the exhaust - Heat exchanger 6 by flowing exhaust gas 12, transferred to the fluid 4.
  • About the Fluidauslasstechnisch 16 is heated in the gas from the heat exchanger 6 heated fluid 4 from the exhaust gas heat exchanger 6.
  • the exhaust gas heat exchanger 6 is part of a Dampferzeu gers 18 of the system 2.
  • the steam generator 18 serves to convert the said fluid 4 from a liquid state into steam.
  • Other components of the steam generator 18, wel che a better clarity, not shown in FIG 1, are connected via the Fluidauslasstechnisch 16 with the exhaust gas heat exchanger 6.
  • the exhaust gas 12 may contain substances, such as sulfur oxides and / or carbon oxides, which in the presence of (in the exhaust gas 12 contained) steam acids, such as for example sulfuric acid and / or carbonic acid, form, in particular after condensation on a Heat exchange surface of the exhaust gas heat exchanger 6 can lead to corrosion on the exhaust gas heat exchanger 6.
  • the system 2 has a corrosion protection device 20.
  • the corrosion protection device 20 can heat the fluid 4 flowing through the fluid inlet line 14 such that the temperature of the fluid 4 in the region of the fluid inlet 8 of the exhaust gas heat exchanger 6 is so great that condensation of such acids is prevented.
  • the corrosion protection device 20 comprises an absorption chiller 22, which has inter alia an expeller 24, a condenser 26 and an evaporator 28.
  • the absorption chiller 22 serves to heat from a heat source 30 to be cooled by the
  • the corrosion protection device 20 comprises a ther mixed to the expeller 24 of the absorption chiller 22 coupled heat supply line 32, which with its one the passage-side end 32a opens into the fluid outlet line 16 and opens with its output end 32b in the fluid inlet line 14.
  • the corrosion protection -Ein device 20 includes a bypass line 34 which opens into the heat supply line 32 with its input end 34a and ends with its output end 34b in the Fluideinlasslei device 14.
  • the bypass line 34 comprises a valve 36, which as
  • the heat supply line 32 also includes a valve 38, which forms out as a control valve.
  • the heat supply line 32 is equipped with a fluid feed pump 40, which is preferably upstream of the input end 34 a of
  • Bypass line 34 is arranged.
  • the corrosion protection device 20 comprises a heat removal line 42, which is thermally coupled to the condenser 26 of the absorption chiller 22 and opens into the fluid inlet line 14 both at its input end 42a and at its output end 42b.
  • the fluid inlet line 14 has a valve 44, which is designed as a shut-off valve. The mass flow of the fluid 4 in the heat removal line 42 is adjusted by means of this valve 44. If the valve 44 of the heat removal line 42 is completely closed, the entire fluid 4 introduced into the fluid inlet line 14 flows from the fluid inlet line 14 into the heat removal line 42, from where the fluid 4, after flowing through the heat discharge line 42, flows again into the fluid inlet line 14.
  • the system 2 also has a coolant circuit 46 which is thermally coupled to the evaporator 28 of the Absorptionskarltema machine 22 and a coolant delivery pump 48 as a refrigeration consumer 50 includes.
  • a heat memedium 52 is passed through the heat supply line 32 which is used to supply heat to the fluid 4 flowing through the fluid inlet line 14.
  • the heat medium 52 is in the present embodiment around a portion of the flowing from the fluid outlet 10 of the exhaust gas heat exchanger 6 in the Fluidauslasstechnisch 16 fluid 4, which is discharged by means of the heat supply line 32 from the Fluidauslass effet 16.
  • the entire in the heat supply line 32 is used to operate the expeller 24 of the Ab sorptionshimltemaschine 22.
  • the nuclearme medium 52 is a part of its heat to the expeller 24 from the sorption chiller 22 from.
  • the heat medium 52 serves as a heat source for the expeller 24 of the Ab sorptionshimltemaschine 22.
  • the heat medium flowing through the heat supply line 32 52 after it has given a portion of its heat to the expeller 24, via the heat supply line 32 into the fluid inlet line 14th one headed. As a result, the heat medium 52 becomes a constituent part of the fluid 4 flowing through the fluid inlet pipe 14.
  • the heat remaining in the heat medium 52 heats the remaining portion of the fluid 4 flowing through the fluid inlet pipe 14.
  • the absorption chiller 22 uses the heat emitted by the heat medium 52 to the expeller 24, on the one hand to extract heat from the aforementioned heat source 30 to be cooled and, on the other hand, to transfer heat to the fluid 4 in the heat removal line 42.
  • the heat source 30 to be cooled is a coolant 54 which circulates through the coolant circuit 46.
  • the coolant 54 absorbs heat from the cold consumer 50 and supplies at least part of this heat to the compressor. steamer 28 of the absorption chiller 22 from. Via its condenser 26, the absorption chiller 22 discharges at least part of the heat absorbed by it to the fluid 4 in the heat removal line 42, which is conducted from the heat removal line 42 into the fluid inlet line 14.
  • the Ab sorptionshimltemaschine 22 thus serves on the one hand to heat the fluid flowing through the fluid inlet 14 fluid 4 for the purpose of corrosion protection and on the other hand provide cold performance for the coolant circuit 46.
  • the introduction of the heat medium 52 into the fluid inlet line 14 via the bypass line 34 may be advantageous in particular at low outside temperatures, because at low outside temperatures typically more heat has to be supplied to the fluid 4 flowing through the fluid inlet line 14 in order to prevent condensation of corrosive substances on the exhaust gas. Heat exchanger 6 safe to avoid. In addition, at niedri conditions outside temperatures optionally - for example, if the refrigeration consumer 50 is a room to be air conditioned - a lower cooling capacity for the coolant circuit 46 may be required. An energy-efficient operation of the system 2 is characterized it is sufficient that the corrosion protection device 20 provides a cold performance for which (apart from the negligible ble electrical power demand of Absorptionshimltema machine 22) no otherwise usable energy is consumed.
  • the corrosion protection device 20 thus makes it possible, in particular, to provide cooling capacity for the heat source 30 to be cooled or for the cold load 50, without additional energy expenditure being required for generating the cooling capacity.
  • an energyeffi zienter operation of the system 2 is achieved in that the heat me, which is transmitted from the coolant circuit 46 and the coolant circulating 46 iniremit telnikank 46 on the fluid inlet line 14 flowing fluid 4, as additional usable heat (for example He generation of steam) is available.
  • additional usable heat for example He generation of steam
  • FIG. 2 schematically shows a second system 56 for heating and / or vaporizing a fluid 4, which may be, for example, Be part of a combined cycle power plant. Also in the present embodiment, the fluid 4 is feedwater.
  • the fluid outlet line 16 in the system 56 of FIG 2 a valve 58 which is designed as a control valve and is arranged between the input-side end 32a and the output-side end 32b of the heat supply line 32.
  • the aboardversor supply line 32 is not equipped with its own fluid feed pump 40 (see FIG 1).
  • the mass flow of the fluid 4 in the heat supply line 32 can be adjusted by means of the valve 58 of the fluid outlet line 16 and of the valve 38 of the heat supply line 32. If the valve 58 of the fluid outlet line 16 is fully closed constantly and the valve 38 of the heat supply line 32 at least partially open, the entire fluid 4 issuing from the exhaust gas heat exchanger 6 is passed through the heat supply line 32.
  • both valves 38, 58 may be at least partially open at the same time.
  • the absorption chiller 22 is designed so that the absorption chiller 22 can deliver as much heat via its condenser 26 to the fluid 4 flowing through the heat removal line 42 that a sufficiently large fluid temperature in the area of the fluid inlet 8 of the exhaust gas heat exchanger 6 can be achieved so that condensation of corrosive substances on the exhaust gas heat exchanger 6 is prevented.
  • a reintroduction of the exhaust gas from the exhaust gas Heat exchanger 6 outflowing fluid 4 in the fluid inlet line 14 by means of the heat supply line 32 - for Zwe bridge the heating of the fluid inlet line 14 strö coming fluid 4 - is therefore not required in this embodiment.
  • valve 38 of the heat supply line 32 can be closed.
  • the valve 58 of the fluid outlet line 16 is at least partially opened.
  • FIG 3 schematically shows a third system 60 for heating and / or evaporating a fluid 4, which may for example be part of a combined cycle power plant. Also in the present embodiment, the fluid 4 is feedwater.
  • the heat supply line 32 of the corrosion protection device 20 opens with her eingangssei gene end 32a in a vapor-side portion 62 of the Dampferzeu gers 18, ie in that part of the steam generator 18, in which the fluid 4 is in the form of vapor.
  • steam 64 which flows from the steam side portion 62 of the steam generator 18 in the Cyprusver supply line 32, as a heat medium 52 for Betrei ben of the expeller 24 of the absorption chiller 22 ver used.
  • the flowing through the heat supply line 32 niesmedi by 52 are a part of its heat to the expeller 24 of the absorption chiller 22 from. In this case, condenses the heat medium 52. As condensate, the heat medium 52 via the heat supply line 32 into the fluid inlet line 14 ge passes. Also in the present embodiment, no bypass line 34 is provided (see FIG 1). In addition, the heat supply line 32 does not have its own fluid feed pump 40 (see FIG. The mass flow of the heat medium 52 in the heat supply line 32 is in the system 60 of FIG 3 using the valve 38 of the heat supply line 32 is turned.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

L'invention concerne une installation (2, 56, 60) servant à réchauffer et/ou à évaporer un fluide (4). L'installation comprend un échangeur de chaleur de gaz d'échappement (6) servant à transférer de la chaleur de gaz d'échappement sur le fluide (4), un conduit d'entrée (14) de fluide raccordé à une entrée (8) de fluide de l'échangeur de chaleur de gaz d'échappement (6), servant à amener le fluide (4) vers l'échangeur de chaleur de gaz d'échappement (6) et un dispositif de protection anti-corrosion (20) servant à réchauffer le fluide (4) s'écoulant à travers le conduit d'entrée (14) de fluide. L'invention vise à permettre un fonctionnement à efficacité énergétique plus élevée de l'installation (2, 56, 60). L'invention propose à cet effet que le dispositif de protection anti-corrosion (20) comporte une machine réfrigérante à absorption (22) servant à transférer de la chaleur d'une source de chaleur (30) à refroidir sur le fluide (4) s'écoulant à travers le conduit d'entrée (14) de fluide. L'invention concerne par ailleurs un procédé servant à faire fonctionner une installation (2, 56, 60) de ce type.
PCT/EP2019/051857 2018-03-20 2019-01-25 Installation servant à réchauffer et/ou à évaporer un fluide et procédé servant à faire fonctionner une installation de ce type Ceased WO2019179676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018204252 2018-03-20
DE102018204252.7 2018-03-20

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WO2019179676A1 true WO2019179676A1 (fr) 2019-09-26

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173949A (en) * 1978-01-23 1979-11-13 Tranter, Inc. Feedwater preheat corrosion control system
DE2938901A1 (de) * 1979-09-26 1981-04-16 Dietrich E. Dipl.-Ing. 8012 Ottobrunn Singelmann Kompressorlose waermepumpe
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WO2017001241A1 (fr) * 2015-06-30 2017-01-05 Gutscher Rudolf Centrale à vapeur
US20170175589A1 (en) * 2015-12-21 2017-06-22 Cockerill Maintenance & Ingenierie S.A Condensing heat recovery steam generator
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